Lahar is an outflow of mud, rock and other pyroclastic material from a volcano which mixes with water as it proceeds down a river valley . Essentially it is a mudflow or landslide resulting from volcanic action, usually very fast moving and destructive. In some cases it can be more destructive than the actual volcanic eruption.
Lahars look and behave like flowing debris, and concrete, (also ash) and their impact destroys most man made structures. Mt Rainer had lahars that traveled at 70/80 km/h at depths of 30 meters or more.
A lahar is a mudflow made from ash and similar volcanic material. These mudflows moves like floods but are denser, making them more destruct. Buildings can be crushed or carried away, and towns can be buried. When a lahars stops the mud stays where it is and eventually hardens. People may be buried alive.
A lahar is a mudflow that forms from the mixing of volcanic ash with water. It can result from an eruption melting snow and ice on top of the volcano or from heavy rain fallin on an ash deposit. A lahar behaves in a similar manner to a flash-flood but is about as dense as concrete. As a result, people may easily be caught off guard and then be swept away, droanwed, or crushed. After a lahar stops the mud settles and hardens, potentially trapping people in it.
A lahar is a volcanic mudflow that can be initiated in a few ways. In some cases an eruption can melt the snow pack on top of a volcano. This then mixes with ash both from the eruption and previously deposited, forming a mass of flowing mud. At other times muflows can occur when heavy rain falls on volcanic ash. Other mudflows can be initiated by landslides on volcanoes, especially where acid from volcanic gasses has turned the rock into clay.
A Lahar is a type of mudflow made of pyroclastic material and water that flows down from a volcano. the word Lahar originated from Indonesia. Lahars can be deadly because of their energy and speed.
Lahars can occur even without any current volcanic activity, as long as the conditions are right to cause the collapse and movement of mud originating from existing volcanic ash deposits.
A lahar is a volcanic mudflow. These mudflows are very dangerous and destructive. They can be triggered in a couple different ways. In some cases an eruption melts snow and ice which then mixes with volcanic ash to form a mudflow. In other cases a mudflow can occur when heavy rain saturates ash and mobilizes it.
Synonyms for lahar include mudflow and debris flow.
A lahar can occur if water, most likely from heavy rain, mobilizes a pre-existing deposit of volcanic ash.
Other names for Lahars include:
Lahars usually occur with stratovolcanoes.
brilliantly colored sunrises and sunsets
100000 people were hurt in the eruption of mount Pinatubo
There are two ways can happen. It can happen during an eruption as the heat melts overlying snow and ice, which then mixex with the ash. It can also occur in the absense of an ongoing eruption if heavy rain falls on an ash deposit.
it is called a lahar
Mount Tambora is famous for the eruption is 1815-1816 which also made "The Year Without Summer" occur
brilliantly colored sunrises and sunsets
Landslide commonly occur during the year or after a Lahar or just after a Volcanic Eruption
Lahar Indonesian term for a volcanic mudflow. Because they can occur before eruptions, after eruptions or without eruptions, they occur quite often.
Lahars are the result of volcanic ash mixing with large amount of water. They can form in two ways. In some cases an erupting volcano can melt snow and ice near its summit. The resulting meltwater mixes with the ash and forms a lahar. A lahar can also occur without an eruption if heavy rain falls on ash deposits.
Cotopaxi volcano is in Ecuador. A volcano magma can be measured during and after volcano eruption. The Cotopaxi eruption in 1987, its lahar has travelled for 60 miles.
100000 people were hurt in the eruption of mount Pinatubo
Neither. It is a volcano that famously erupted in 2010. The eruption produced pyroclastic flows.
There are two ways can happen. It can happen during an eruption as the heat melts overlying snow and ice, which then mixex with the ash. It can also occur in the absense of an ongoing eruption if heavy rain falls on an ash deposit.
it is called a lahar
Most likely the snow would melt from the heat. The water would then mix with ash from the eruption, leading to a mudflow called a lahar.
Kelvin S. Rodolfo has written: 'Pinatubo and the politics of lahar' -- subject(s): Eruption, 1991, Lahars
A Quiet eruption is one in which no rock or material is erupted from the crater , A violent is one where huge load explosion/ eruption throwing Rocks/ Scoria /Steam /Ash from the vent.May be Lahar as well